Get a free site inspection and quote today email ENQUIRE HERE phone 1300176278

How Much Does it Cost to Design a Granny Flat?

The standard cost for designing and getting CDC approval on a Granny Flat is between $7,000-$12,000 depending on the builder or design company. Granny flat designs can vary in cost to construct, but generally, the cost to design remains the same.

How Much Does it Cost to Build a One-Bedroom Granny Flat?

Investing in a one-bedroom granny flat is a viable option for first-time investors. It can be your ideal space for extended family members, guests, and elders.

Standard one-bedroom Granny Flat, at 60m2, can cost around $127,000 at the time of writing this article. This Granny flat price includes the design, approval, and construction.

How Much Does it Cost to Build a Two-Bedroom Granny Flat?

A two-bedroom Granny Flat will be a comfortable place for your parents or grandparents. They also provide a comfortable living place for your visitors while in town. Saving you from having to pay for lodging or having them stay in your living room.

For a typical 60sqm two-bedroom granny flat plan cost is around $128,000 including design, approval, and build at the time of writing this article. However, the price will vary depending on which builder you choose.

If you are about to invest in Granny Flats, the drastically fluctuating price range on the internet must be making you question what is the true cost. Some builders in Sydney start their 60sqm Granny Flat cost as low as $110,000 while others have a $160,000 starting price. Be cautious of the lowest quote as the cheapest does not necessarily represent the best value and in many cases, it can cost you more in the long run.

Deciding on a Granny Flat Builder

When deciding on a granny flat builder. It is equally if not more important to assess their reputation and experience in the industry. While you may be able to find a cheaper quote from a builder with less experience or without a reliable reputation there are inherent risks that come with this which can result in you paying much more overall.

Including council and design fees, Granny Flats can range between $120,000 and $170,000. Custom Granny flat floor plans cost no extra cost with Smart Choice Granny Flats.

There is no quick answer to predict the estimated price of a Granny Flat since various factors influence the price. The cost of the Granny Flat depends on your property’s site conditions. Granny flat design, and the Granny flat builder you choose.

This guide will clear the confusion by shedding light on the matter.


For an enjoyable building experience with a quality finished product, with quality inclusions and materials pick a granny flat builder in Sydney that has been building granny flats for a long time and has a good reputation. The best price is one where you get exactly what you want for a good price. Looking for the cheapest price will likely lead to a poor choice. Make a Smart Choice by picking a company like Smart Choice Granny Flats.